package com.atguigu.flink.chapter04;

import org.apache.flink.api.common.functions.FlatMapFunction;
import org.apache.flink.api.common.functions.MapFunction;
import org.apache.flink.api.java.functions.KeySelector;
import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.configuration.Configuration;
import org.apache.flink.streaming.api.datastream.DataStreamSource;
import org.apache.flink.streaming.api.datastream.SingleOutputStreamOperator;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.util.Collector;

/**
 * @author liuyun
 * @title: Flink02_Wc_UnBounded
 * @projectName flink0924
 * @description: TODO
 * @date 2022-3-1 17:49
 */
public class Flink02_Wc_UnBounded {
    public static void main(String[] args) throws Exception {
        Configuration conf = new Configuration();
        conf.setInteger("rest.port", 2000);
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
        //env.setParallelism(1);
        env.disableOperatorChaining();

        DataStreamSource<String> dataStreamSource = env.socketTextStream("hadoop162", 9999);

        SingleOutputStreamOperator<Tuple2<String, Long>> result = dataStreamSource
                .flatMap(new FlatMapFunction<String, String>() {
                    @Override
                    public void flatMap(String line, Collector<String> collector) throws Exception {
                        String[] words = line.split(" ");
                        for (String word : words) {
                            collector.collect(word);
                        }
                    }
                }).map(new MapFunction<String, Tuple2<String, Long>>() {
                    @Override
                    public Tuple2<String, Long> map(String word) throws Exception {
                        return Tuple2.of(word, 1L);
                    }
                }).keyBy(new KeySelector<Tuple2<String, Long>, String>() {
                    @Override
                    public String getKey(Tuple2<String, Long> t) throws Exception {
                        System.out.println(t.f0);
                        return t.f0;
                    }
                }).sum(1);

        result.print();
        env.execute();


    }
}
